The number of Americans traveling for the Labor Day holiday weekend will climb to the most in five years as consumer confidence boosts spending. Here are the cities with the worst traffic.

The number of Americans traveling for the Labor Day holiday weekend will climb to the most in five years as consumer confidence boosts spending. Here are the cities with the worst traffic.

Photo: DAVID J. PHILLIP, AP

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According to a study released by Kirkland, Wash.-based data firm INRIX, Houston's traffic congestion ranks at No. 20 in North America among large metros. Check out how the city fared compared to other American and Canadian cities.

Note: The following areas are ranked in terms of their overall
congestion, not just hours wasted due to traffic jams. less

According to a study released by Kirkland, Wash.-based data firm INRIX, Houston's traffic congestion ranks at No. 20 in North America among large metros. Check out how the city fared compared to other American ... more

Photo: George Rose, Getty Images

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50. Worcester

– 9.9 hours wasted in congestionRank in 2013: Same

50. Worcester

– 9.9 hours wasted in congestion
Rank in 2013: Same

Photo: Boston Globe, Getty Images

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49. Cincinnati

– 11.6 hours wasted in congestionRank in 2013: No. 48

49. Cincinnati

– 11.6 hours wasted in congestion
Rank in 2013: No. 48

Photo: Andy Lyons, Getty Images

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48. Riverside

– 14.7 hours wasted in congestionRank in 2013: No. 49

48. Riverside

– 14.7 hours wasted in congestion
Rank in 2013: No. 49

Photo: Kevork Djansezian, Getty Images

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47. Raleigh

– 12.1 hours wasted in congestionRank in 2013: No. 40

47. Raleigh

– 12.1 hours wasted in congestion
Rank in 2013: No. 40

Photo: Twbuckner/flickr

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46. Pittsburgh

– 13 hours wasted in congestionRank in 2013: Same

46. Pittsburgh

– 13 hours wasted in congestion
Rank in 2013: Same

Photo: Sarah L. Voisin, Getty Images

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45. Jacksonville

– 12.5 hours wasted in congestionRank in 2013: Same

45. Jacksonville

– 12.5 hours wasted in congestion
Rank in 2013: Same

Photo: Selectashot.com

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44. New Orleans

– 13.1 hours wasted in congestionRank in 2013: No. 34

44. New Orleans

– 13.1 hours wasted in congestion
Rank in 2013: No. 34

Photo: Cheryl Gerber, Getty Images

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43. Ottawa

– 12.6 hours wasted in congestionRank in 2013: No. 47

43. Ottawa

– 12.6 hours wasted in congestion
Rank in 2013: No. 47

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42. Sacramento

– 13.8 hours wasted in congestionRank in 2013: No. 41

42. Sacramento

– 13.8 hours wasted in congestion
Rank in 2013: No. 41

Photo: Justin Sullivan, Getty Images

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41. Las Vegas

– 12.7 hours wasted in congestionRank in 2013: No. 44

41. Las Vegas

– 12.7 hours wasted in congestion
Rank in 2013: No. 44

Photo: Matt York, AP

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40. Phoenix

– 14 hours wasted in congestionRank in 2013: No. 43

40. Phoenix

– 14 hours wasted in congestion
Rank in 2013: No. 43

Photo: Richard Ellis, Getty Images

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39. San Antonio

– 13.4 hours wasted in congestionRank in 2013: No. 38

39. San Antonio

– 13.4 hours wasted in congestion
Rank in 2013: No. 38

Photo: Julysa Sosa / For The San Antonio Express-News

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38. Oxnard

– 13.2 hours wasted in congestionRank in 2013: No. 37

38. Oxnard

– 13.2 hours wasted in congestion
Rank in 2013: No. 37

Photo: Ed Compean, Getty Images

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37. Colorado Springs

- 12.1 hours wasted in congestionRank in 2013: No. 53

37. Colorado Springs

- 12.1 hours wasted in congestion
Rank in 2013: No. 53

Photo: Spencer Platt, Getty Images

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36. Detroit

– 14.6 hours wasted in congestionRank in 2013: No. 35

36. Detroit

– 14.6 hours wasted in congestion
Rank in 2013: No. 35

Photo: Bill Pugliano, Getty Images

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35. Providence

– 13.6 hours wasted in congestionRank in 2013: No. 42

35. Providence

– 13.6 hours wasted in congestion
Rank in 2013: No. 42

Photo: Darren McCollester, Getty Images

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34. Baton Rouge

– 14.7 hours wasted in congestionRank in 2013: No. 29

34. Baton Rouge

– 14.7 hours wasted in congestion
Rank in 2013: No. 29

Photo: Jerry Grayson/Helifilms Australi, Getty Images

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33. Milwaukee

– 13.2 hours wasted in congestionRank in 2013: No. 36

33. Milwaukee

– 13.2 hours wasted in congestion
Rank in 2013: No. 36

Photo: Visions Of America, Getty Images

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32. Nashville

– 16.3 hours wasted in congestionRank in 2013: No. 33

32. Nashville

– 16.3 hours wasted in congestion
Rank in 2013: No. 33

Photo: Jeff Gentner, Getty Images

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31. Hartford

– 15.5 hours wasted in congestionRank in 2013: No. 32

31. Hartford

– 15.5 hours wasted in congestion
Rank in 2013: No. 32

Photo: Christian Abraham, ST

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30. Orlando

– 18.2 hours wasted in congestionRank in 2013: No. 31

30. Orlando

– 18.2 hours wasted in congestion
Rank in 2013: No. 31

Photo: Lea, Getty Images

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29. Calgary

– 16.7 hours wasted in congestionRank in 2013: No. 27

29. Calgary

– 16.7 hours wasted in congestion
Rank in 2013: No. 27

Photo: George Rose, Getty Images

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28. Charlotte

– 19.0 hours wasted in congestionRank in 2013: No. 30

28. Charlotte

– 19.0 hours wasted in congestion
Rank in 2013: No. 30

Photo: Scott Olson, Getty Images

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27. Virginia Beach

– 18.3 hours wasted in congestionRank in 2013: No. 25

27. Virginia Beach

– 18.3 hours wasted in congestion
Rank in 2013: No. 25

Photo: Brendan Hoffman, Getty Images

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26. New Haven

– 19.5 hours wasted in congestionRank in 2013: No. 28

26. New Haven

– 19.5 hours wasted in congestion
Rank in 2013: No. 28

Photo: Christopher Capozziello, Getty Images

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25. Dallas

– 22.1 hours wasted in congestionRank in 2013: No. 24

25. Dallas

– 22.1 hours wasted in congestion
Rank in 2013: No. 24

Photo: Tom Pennington, Getty Images

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24. Atlanta

– 25.2 hours wasted in congestionRank in 2013: No. 23

24. Atlanta

– 25.2 hours wasted in congestion
Rank in 2013: No. 23

Photo: Barry Williams, Getty Images

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23. Tampa

– 21.5 hours wasted in congestionRank in 2013: No. 22

23. Tampa

– 21.5 hours wasted in congestion
Rank in 2013: No. 22

Photo: BRENDAN SMIALOWSKI

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22. Denver

– 23.3 hours wasted in congestionRank in 2013: No. 26

22. Denver

– 23.3 hours wasted in congestion
Rank in 2013: No. 26

Photo: Doug Pensinger, Getty Images

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21. Baltimore

– 23.3 hours wasted in congestionRank in 2013: Same

21. Baltimore

– 23.3 hours wasted in congestion
Rank in 2013: Same

Photo: Patrick Smith, Getty Images

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20. Houston

– 26.7 hours wasted in congestionRank in 2013: No. 19 (No. 17 in just the United States)

20. Houston

– 26.7 hours wasted in congestion
Rank in 2013: No. 19 (No. 17 in just the United States)

The number of Americans traveling for the Labor Day holiday weekend will climb to the most in five years as consumer confidence boosts spending, AAA forecast.

People taking trips of 50 miles (80 kilometers) or more from home will increase to 34.1 million from 32.7 million last year, AAA, the biggest U.S. motoring organization, said in its annual outlook. That's the highest level since a record 45.1 million travelers five years ago. The long weekend runs from Aug. 29 to Sept. 2.

"Consumers are the most upbeat they have been since early 2008," according to AAA, which cited economic optimism fueled in part by a strengthening housing market.

The Thomson Reuters/University of Michigan index of consumer sentiment in the U.S. hit a six-year high in July. New-home construction climbed 5.9 percent to an 896,000 annualized rate that same month, and the S&P/Case-Shiller index of property values in 20 cities rose 12.2 percent in May from a year earlier, the biggest 12-month gain since March 2006.

The expected gain in Labor Day travel is driven by "the increasingly positive economic outlook and optimism in the housing market," Robert L. Darbelnet, chief executive officer of Heathrow, Florida-based AAA said in a statement. "As home prices improve in many parts of the country, more families are feeling comfortable about traveling this Labor Day holiday."

Travel by automobile will rise 4.3 percent to 29.2 million travelers from 28 million a year ago. The number of air travelers during the holiday will increase 2.8 percent to 2.61 million from 2.54 million a year ago, making up 8 percent of travel, according to AAA.

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As of mid-August, retail gasoline prices were about 2.7 percent lower than the same time a year ago, AAA said. The prices at the pump last Labor Day averaged $3.83 a gallon, a record high for the holiday.

"AAA forecasts gas prices to remain less expensive than last year based on current trends through the middle of August, but there remains the potential for late-summer hurricanes and refinery problems that could send prices higher," the group said.

The average distance traveled during the holiday will be 594 miles, down from 626 miles a year earlier, while spending will rise to $804 from $749 per trip, AAA said, based on the median estimate.

The projections by AAA are based on research and forecasts from IHS Global Insight.